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Two airports A and B are such that B is 500 km due East of A. At the same time, plane P and Q take off from A and B respectively. Plane P flies at 360 km/h on a bearing of 030°. Plane Q flies at 240 k

Mathematics

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Here's the solution to , which involves calculating distances and providing instructions for drawing the positions of the planes.

Problem Statement:
Two airports A and B are such that B is 500 km due East of A. At the same time, plane P and Q take off from A and B respectively. Plane P flies at 360 km/h on a bearing of 030°. Plane Q flies at 240 km/h on a bearing of 315°. Both planes fly for 90 minutes.

a) Draw the position of the planes after 90 minutes using a scale 1:10,000,000.

  1. Convert flight time to hours.

    Time=90 minutes=9060 hours=1.5 hours\text{Time} = 90 \text{ minutes} = \frac{90}{60} \text{ hours} = 1.5 \text{ hours}
  2. Calculate the actual distance travelled by each plane.

    • Plane P (from A): DistanceP=SpeedP×Time\text{Distance}_P = \text{Speed}_P \times \text{Time} DistanceP=360 km/h×1.5 h=540 km\text{Distance}_P = 360 \text{ km/h} \times 1.5 \text{ h} = 540 \text{ km}
    • Plane Q (from B): DistanceQ=SpeedQ×Time\text{Distance}_Q = \text{Speed}_Q \times \text{Time} DistanceQ=240 km/h×1.5 h=360 km\text{Distance}_Q = 240 \text{ km/h} \times 1.5 \text{ h} = 360 \text{ km}
  3. Determine the scale factor and convert actual distances to drawing lengths.

    The given scale is 1:10,000,000.
    This means 1 unit on the drawing represents 10,000,000 units in reality.
    Let's convert this to a more practical unit for distance:

    10,000,000 cm=100,000 m=100 km10,000,000 \text{ cm} = 100,000 \text{ m} = 100 \text{ km}

    So, 1 cm on the drawing represents 100 km in reality.

    • Distance between A and B on drawing: LengthAB=500 km100 km/cm=5 cm\text{Length}_{AB} = \frac{500 \text{ km}}{100 \text{ km/cm}} = 5 \text{ cm}
    • Distance travelled by Plane P on drawing: LengthP=540 km100 km/cm=5.4 cm\text{Length}_P = \frac{540 \text{ km}}{100 \text{ km/cm}} = 5.4 \text{ cm}
    • Distance travelled by Plane Q on drawing: LengthQ=360 km100 km/cm=3.6 cm\text{Length}_Q = \frac{360 \text{ km}}{100 \text{ km/cm}} = 3.6 \text{ cm}
  4. Instructions for drawing the positions of the planes (Part a).

    To draw the positions, follow these steps:

    1. Establish Airport A: Choose a point on your paper, preferably towards the bottom left, and label it A. This represents Airport A.
    2. **
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